barton



April 9, 1929. ,L B 1,708,352

CONCRETE STEEL CONSTRUCTION April 9, 1929. F. M. BARTON CONCRETE STEELCONSTRUCTION Filed Dec. 1925 2 Sheets-Shee t 3 Patented Apr. 9, 1929.

UNITED STATES PATENT OFFICE.

FRANCIS M. BARTON, OF CHICAGO, ILLINOIS, ASSIGNOR TO BARTON SPIDER-WEBSYSTEM, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CONCRETE-STEEL CONSTRUCTION.

Application filed December 3, 1925.

The invention relates to concrete steel construction. In steelreinforcement for beams, it is now common practice to provide a seriesof stirrups to support the reinforcing rods which extend longitudinallyof the beam. In some instances, the stirrups are independent of oneanother, and in other instances a series of them are connected by barsrigidly secured thereto. The latter construction has the advantage ofbeing placed in position as a unit in the form. A disadvantage incidentto the unit constructions is that they are bulky in handling andtransportation.

The primary object of the present invention is to provide a unitcomprising a serles of stirrups which are connected together by barsextending longitudinally of the beam which may be folded for conveniencein handling and to reduce their bulk in transportation. viding astructure'in which the legs of a series of stirrips are pivotallyconnected to longitudinally extending bars in such manner that the barsand legs may be brought together in compact relation until they havebeen brought to the concrete form for installation in a beam. Anotherobject is to provide improved spacing and supporting lugs for thestirrup.

The invention consists in the several novel features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a perspective of a structure embodying theinvention, the members thereof being spread apart for installation. Fig.2 is an inverted plan, showing the structure in its folded or compactedposition. Fig. 2 is a perspective of one of the lugs or feet forsupporting the stirrups.

Fig. 2 is an elevation of said bracket with the stirrup therein. Fig. 3is a section, showing the structures in operative position. Fig. 41- isa detail, showing the deformation in the legs of the stirrups forholding them against longitudinal movement with respect to theconnecting bars. Figs. 5 and 6 are details, showing the connectionbetween the stirrup legs and the connecting bars. Figs. 7 and 8 aredetails, showing the manner of notching the bar to-receive the stirruplegs and the deformation of the bar to pivotally connect the legs andthe bar.

The invention is exemplified in a structure comprising a series ofstirrups formed of This object is attained by pro-' Serial No. 72,858.

steel rods each comprising legs 10 and 11, a bottom cross member 12 andout-turned terminals 13 at the upper ends of the legs, all of said partsbeing integrally formed. Some of the stirrups are provided withdownwardly and outwardly extending lugs or feet 14 adapted to rest inthe corners at the bottom of the concrete-form in which the concretebeam is cast, to space the member 12 the desired distance from thebottom of the beam, so as to space and support reinforcing rods 16 whichextend longitudinally of the beam above the bottom of the beam, as wellunderstood in the art. The out-turned ends 13 are adapted to extend intothe floor slab contiguous to the beam, leaving the tops of the stirrupsopen so the rods 16 can be placed from above onto the cross-members 12of the stirrups. The legs 11 of the stirrups extend through holes 17respectively in a bar 18. This bar thus connects all of the legs 11 atone side of the entire series of stirrups. In fabricating the unit,holes 17 are open at one side, as shown in Fig. 7, to permit the legs tobe slipped into them, and after they have been placed therein, the metaladjacent the sides of the open end of the hole is bent inwardly, as at19, to prevent separation of the legs from the bar while permittingrelative rotation between the bar and the legs. To hold the bars 18against relative vertical displacement with respect to the stirrup legs,each lug is cut and deformed, as at 20, to form lugs above and below thebar between which the bar will be vertically confined. The legs 10 ofthe entire series of st-irrups at the opposite side are similarlyconnected by a lower longitudinally extending bar 21 and an upperlongitudinally extending bar 22. These bars 21 and 22 serve to space thestirrup legs 10, and are pivotally connected to said legs by holes 17and indented portions 19 as aforesaid, and are confined against verticalmovement on the legs by lugs 20. To space the upper portions of thestirrup-legs and the connecting bars inward- 1y of the sides of thebeam, each of said bars is formed with outstruck portions 23 in anydesired number, the outer edges of these portions being adapted toengage the sides 15 of the form used in casting the concrete of thebeam. The bars 18, 21 and 22 serve as longitudinal reinforcing bars forthe con crete beam, as well as spacing elements for the stirrups.

The stirrups and bars, to which they are pivotally connected, arefabricated as aunit,

and this is usually done in the shop where the reinforcement is made.When a unit has been 'asseinb'l'ed, it may be folded together, as shownin Fig; 2, sot'hat a large nunber' of units may be shipped in acomparatively small space the pivotal connections between the stirruplegs andthe bars making this possible. When the unit is to be installed,it is only necessary to spread tlrebars 1-8 from the bars 21, 22 intothe position shown in F 1 and place it as a unitary structure in the'iorm, so that-no individual placing of the stir-rups will be necessary;'A turther characteristic of the unit is that it is adapted for beams ofdiiterent widths, because the pivotal connections between the bars andthe stirrup legs permit the legs on one side to beswung towards theother'side a greater or less distance ifthe unit is to be used in a beamof somewhat less width than the maximum for which t is adapted when thele s are spread to thetfullest degree.

n practice, it has been found that a 1311i"; rality of bars connectingthe stirrup legs one side and a single bar connecting stirrup legs atthe other side aresuiiicient to keep the stirrups properly spaced Thesingle bar is vertically olfset with respect to the plurality of bars-sothat the inner edges of the bars can be brought into engagement with thestirrup legs on the opposite side of the stirrups, so that the legs atone side will be brought approximately into alignment with the legs atthe other side.

Each lug it is formed of a single piece otsheet metal shaped to form arecess '30 con-- bent around the other sideot the stirrup to rigidlysecure the lug thereto. Tongues 32 forming to one side of the lowercorners oi the stirrups, so th at the leg, when seated in said recess,willbe positioned against verti-- cal and rotativ-e movement,- and without ward-and downward extensions 31, which are of the desired length andshape to position the bottom members-23 of the stirrups above the bottomof the form and to position thestirrup legs inwardly of the sides of thebeam-forming portions of the concrete-form and with tongues 32, and 34.which are integral with the lugs and adapted to be and are normallyspread into open position, as SllOW11.lI1 Fig.2 and are bent Into 1 theposition shown in Fig. 3 atterythe corner providing lugs of differentheights or di mensions, the same reinforcing structure maybe diiierentlypositioned in the form.

In practice,

By attaching the lugs to the lower corners of the stirrups, they serveto support the stirrup vertically, as well as to hold it' againstlateral movement. This lug exemplifies one [which can be produced a lowcost and can be quickly attached to they stirrups.

The invention exemplifies a unit for con crete steel construction inwhich individually termed stirrups comprising legs and cross members areconnected"together so" they may be unitarily handled, and which can befolded into a substantially flat struc ture for convenience in shipmentand'h'andling prior to the installation or placement in the terms.

The invention is nottobe'understood as forth, {511166 these restrictedto the details may be modified within the scopeofthe appended claims,without d parting from the spirit and scope of theiinvention.

Having thus described the invention, what desire to secure by Let" Iclaim as new and ters Patent, is: a I

1. In reinforced concreteconstruction, the

combination ot' a series of: individually formed stirrups, each or .saldstirrups con prising'legs and a cross member adapted to supportreinforcing rods, and bars through which extend the legs at the sides ofthe stirrups respectively and inwhich they are pivoted to permit thestructure to be colat the other side.

combination of a series of individually formed stirrups, each of saidstirrup-s comprising legs and a cross member adapted to supportreinforcing rods, and bars connec*- 111g the legs at the sides of thestirrups re:

2. In reinforced concrete construction, the

lapsed laterally to bring the legs at one-side approximately intoalignment with the legs spectively and in which said legs are pivoted topermit the structure to be collapsed to hung the legs at one sideapproximately into alignmentwith the legs at the other *sid'e,z

the legs havingintegral means to'retain the base against ,c

3. In reinforced concreteconstruction, the

combination of a series of individually formed stirrups, each of said.stirrups com prislng legs and a cross member-adapted to supportreinforcing rods, and bars connect-f ing the legs at the-sides ofthe-stirrups re-; spectively and in which they are pivoted to" permitthe structure to be collapsed to bring.

the legs at one side approximately into align ment with the legs atthe-otherside, the bars having open-ended slots through which the legsare extended and deformed portions to retain the legs in the slots, thelegs having 1nent lengthwise ofthe legs,

integral lugs to retain'the bars'against move- 4. In reinforced concreteconstruetion, the combination of a series" of individually movementlengthwise oi? the formed stirrups, each of said stirrups comprisinglegs and a cross member adapted to support reinforcing rods, and barsconnecting the legs at the sides of the stirrups respectively and inwhich they are pivoted to permit the structure to be collapsed to bringthe legs at one side approximately into alignment with the legs at theother side, the bar being provided with means to space them from thesides of the form for the concrete.

5. In reinforced concrete construction, the combination of a series ofindividually formed st-irrups, each of said stirrups comprising legs anda lower cross member adapted to support reinforcing rods, barsconnecting the legs at the sides of the stirrups respectively, andspacing and supporting lugs, each formed of a single piece of flexiblemetal provided with a recess for a portion of the stirrup and integraltongues adapted to be bent around the structure to secure the lug andstirrup together.

6. In reinforced concrete construction, the combination of a series ofindividually formed stirrups, each of said stirrups comprising legs anda lower cross member adapted to support reinforcing rods, barsconnecting the legs at the sides of the stirrups respectively, andspacing and supporting lugs, each formed of sheet metal and with arecess to receive a corner of a stirrup between a leg and a crossmember, and an integral tongue adapted to be bent around said corner tosecure the lug and stirrup together.

7 In reinforced concrete construction, the combination of a series ofindividually formed stirrups, each of said stirrups comprisingvertically extending legs and a lower cros member adapted to supportreinforcing rods, and bars connecting the legs at the sides of thestirrups respectively, the bars being provided with integral outstruckportions to space them from the sides of the form for the concrete.

' 8. In reinforcement for concrete construction, the combination of aseries of individually formed stirrups, each of said stirrups comprisinga pair of legs and a cross member extending between the lower ends ofthe legs and adapted to support reinforcing rods, and a par oflongitudinal members at the sides of the stirrups respectively, saidmembers having integral portions thereof forming sockets in which thelegs are pivotally mounted so as to permit the unit to be collapsed soas to bring the legs at one side thereof approximately into alignmentwith the legs at the other side.

9. In reinforcement for concrete construction, the combination of aseries of individually formed stirrups, each of said stirrups comprisinga pair of legs and a cross member extending between the lower ends ofthe legs and adapted to support reinforcing rods, a pair of longitudinalmembers at the sides of the stirrups respectively, said members havingintegral portions there of forming sockets in which the legs arepivot-ally mounted so as to permit the unit to be collapsed so as tobring the legs at one side thereof approximately into alignment with thelegs at the other side, and legs on some of the stirrups adjacent theintersections of the lower ends of the legs and the ends of thecross-members, for spacing the unit from the bottom of the concreteform.

Signed at Chicago, Illinois, this 20th day of November, 1925.

FRANCIS M. BARTON.

